TL;DR
This paper presents the calculation of next-to-next-to-leading order (NNLO) QCD corrections to nonleptonic B meson decays, including charm quark mass effects, addressing complex computational challenges.
Contribution
It provides the first detailed calculation of NNLO QCD corrections for nonleptonic B-decays with charm mass effects, advancing theoretical precision.
Findings
Successful computation of master integrals for NNLO corrections
Renormalization of effective operators at NNLO
Identification of issues with gamma_5 traces in dimensional regularization
Abstract
The decay of B mesons can be predicted within the Heavy Quark Expansion as the decay of a free bottom quark plus corrections which are suppressed by powers of . This contribution to Loops&Legs 2024 describes the calculation of the NNLO QCD corrections to nonleptonic decays of a free bottom quark including charm quark mass effects. In particular it outlines the challenges in connection to the computation of master integrals, the renormalization of the effective operators and the problems which arise from calculating traces with in dimensions.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Superconducting Materials and Applications